ajax使用POST传递参数

<script type="text/javascript" language="javascript">

var http_request = false;

function makePOSTRequest(url, parameters) {

http_request = false;

if (window.XMLHttpRequest) { // Mozilla, Safari,...

http_request = new XMLHttpRequest();

if (http_request.overrideMimeType) {

// set type accordingly to anticipated content type

//http_request.overrideMimeType('text/xml');

http_request.overrideMimeType('text/html');

}

} else if (window.ActiveXObject) { // IE

try {

http_request = new ActiveXObject("Msxml2.XMLHTTP");

} catch (e) {

try {

http_request = new ActiveXObject<
("Microsoft.XMLHTTP");

} catch (e) {}

}

}

if (!http_request) {

alert('Cannot create XMLHTTP instance');

return false;

}

http_request.onreadystatechange = alertContents;

http_request.open('POST', url, true);

http_request.setRequestHeader("Content-type",
"application/x-www-form-urlencoded");

http_request.setRequestHeader("Content-length",
parameters.length);

http_request.setRequestHeader("Connection",
"close");

http_request.send(parameters);

}

function alertContents() {

if (http_request.readyState == 4) {

if (http_request.status == 200) {

//alert(http_request.responseText);

result = http_request.responseText;

document.getElementById('myspan').innerHTML = result;

} else {

alert('There was a problem with the request.');

}

}

}

function get(obj) {

var poststr = "mytextarea1=" + encodeURI(
document.getElementById("mytextarea1").value ) +

"&mytextarea2=" + encodeURI(
document.getElementById("mytextarea2").value );

makePOSTRequest('post.php', poststr);

}

</script>

<form action="javascript:get(document.getElementById
('myform'));" name="myform" id="myform">

<textarea id="mytextarea1">my test

1

2

3

</textarea>

<textarea id="mytextarea2">my test2

4

5

6</textarea>

<br>

<input type="button" name="button"
value="Submit"

onclick="javascript:get(this.parentNode);">

<input type="submit" name="button"
value="Normal Submit Button">

</form>

<br><br>

Server-Response:<br>

<hr>

<span name="myspan" id="myspan"></span>
<hr>

<?
print_r([b]下边是我找到的一个例子

post.html:

[code]<script type="text/javascript" language="javascript">

var http_request = false;

function makePOSTRequest(url, parameters) {

http_request = false;

if (window.XMLHttpRequest) { // Mozilla, Safari,...

http_request = new XMLHttpRequest();

if (http_request.overrideMimeType) {

// set type accordingly to anticipated content type

//http_request.overrideMimeType('text/xml');

http_request.overrideMimeType('text/html');

}

} else if (window.ActiveXObject) { // IE

try {

http_request = new ActiveXObject("Msxml2.XMLHTTP");

} catch (e) {

try {

http_request = new ActiveXObject<
("Microsoft.XMLHTTP");

} catch (e) {}

}

}

if (!http_request) {

alert('Cannot create XMLHTTP instance');

return false;

}

http_request.onreadystatechange = alertContents;

http_request.open('POST', url, true);

http_request.setRequestHeader("Content-type",
"application/x-www-form-urlencoded");

http_request.setRequestHeader("Content-length",
parameters.length);

http_request.setRequestHeader("Connection",
"close");

http_request.send(parameters);

}

function alertContents() {

if (http_request.readyState == 4) {

if (http_request.status == 200) {

//alert(http_request.responseText);

result = http_request.responseText;

document.getElementById('myspan').innerHTML = result;

} else {

alert('There was a problem with the request.');

}

}

}

function get(obj) {

var poststr = "mytextarea1=" + encodeURI(
document.getElementById("mytextarea1").value ) +

"&mytextarea2=" + encodeURI(
document.getElementById("mytextarea2").value );

makePOSTRequest('post.php', poststr);

}

</script>

<form action="javascript:get(document.getElementById
('myform'));" name="myform" id="myform">

<textarea id="mytextarea1">my test

1

2

3

</textarea>

<textarea id="mytextarea2">my test2

4

5

6</textarea>

<br>

<input type="button" name="button"
value="Submit"

onclick="javascript:get(this.parentNode);">

<input type="submit" name="button"
value="Normal Submit Button">

</form>

<br><br>

Server-Response:<br>

<hr>

<span name="myspan" id="myspan"></span>
<hr>

___FCKpd___1

if we use "&" character it wont work...

but if we use escape();

var poststr = "mytextarea1=" + escape(encodeURI(

document.getElementById("mytextarea1").value ))
+"&mytextarea2=" +

escape(encodeURI( document.getElementById("mytextarea2
").value ));

and next in php u use urldecode , it will work good.

___FCKpd___2